Niles: Dad, hey. How was your evening?
Martin: Ah, couldn't have gone better.
Frasier: Dad, am I mistaken, or did we just hear the sound of a woman's voice out here?
Martin: Oh, yeah, she's in the powder room, but listen...
Frasier: The powder room. I haven't changed the hand towels for three days!
[Niles tsks]
Frasier: Don't you cluck your tongue at me!